net.bytebuddy.implementation.bytecode.constant

Enum NullConstant

java.lang.Object

java.lang.Enum<NullConstant>

net.bytebuddy.implementation.bytecode.constant.NullConstant

All Implemented Interfaces:

Serializable, Comparable<NullConstant>, StackManipulation

public enum NullConstant
extends Enum<NullConstant>
implements StackManipulation

Represents a stack manipulation to load a null pointer onto the operand stack.

Nested Class Summary

Nested classes/interfaces inherited from interface net.bytebuddy.implementation.bytecode.StackManipulation

StackManipulation.AbstractBase, StackManipulation.Compound, StackManipulation.Illegal, StackManipulation.Simple, StackManipulation.Size, StackManipulation.Trivial

Enum Constant Summary

Enum Constants

Enum Constant and Description
INSTANCE The singleton instance.

Method Summary

Modifier and Type	Method and Description
StackManipulation.Size	apply(MethodVisitor methodVisitor, Implementation.Context implementationContext) Applies the stack manipulation that is described by this instance.
boolean	isValid() Determines if this stack manipulation is valid.
static NullConstant	valueOf(String name) Returns the enum constant of this type with the specified name.
static NullConstant[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

INSTANCE

public static final NullConstant INSTANCE

The singleton instance.

Method Detail

values

public static NullConstant[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (NullConstant c : NullConstant.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static NullConstant valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

isValid

public boolean isValid()

Determines if this stack manipulation is valid.

Specified by:

isValid in interface StackManipulation

Returns:

If false, this manipulation cannot be applied and should throw an exception.

apply

public StackManipulation.Size apply(MethodVisitor methodVisitor,
                                    Implementation.Context implementationContext)

Applies the stack manipulation that is described by this instance.

Specified by:

apply in interface StackManipulation

Parameters:

methodVisitor - The method visitor used to write the method implementation to.

implementationContext - The context of the current implementation.

Returns:

The changes to the size of the operand stack that are implied by this stack manipulation.